How else can you write the code in PHP?

Another PHP
•   Chapter 1. Coding standards
•   Chapter 2. OOP
•   Chapter 3. Everything Else
•   Chapter 4.
2

•   PSR
•   Zend
•   PEAR
•   Wordpress
•   Symphony
•   Mediawiki
•   FuelPHP
•   CakePHP
•   CodeIgniter
•   Laravel
•   ...
•   Are
•   you
•   guys
•   MAD?
Chapter 1
Coding standards
3

Chapter 2
OOP
Why do we need objects and classes?
4

Chapter 3
Gitlab Composer
Click me
6

$fetch_refs = function($project) use ($fetch_ref, $repos) {
$datas = array();
try {
foreach (array_merge($repos->branches($project['id']),
$repos->tags($project['id'])) as $ref) {
foreach ($fetch_ref($project, $ref) as $version => $data) {
$datas[$version] = $data;
}
}
} catch (RuntimeException $e) {
// The repo has no commits — skipping it.
}
return $datas;
};
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•   array_column
•   array_map
•   array_search
•   array_reduce
•   array_filter
•   array_walk
•   every / some
Chapter 3
Array Traversing
8

$users = [
['id' => 123, 'first_name' => 'Max', 'last_name' => 'Gopey'],
['id' => 456, 'first_name' => 'Bob', 'last_name' => 'Doe'],
['id' => 789, 'first_name' => 'Alice', 'last_name' => 'Doe'],
];
$lastNames = array_column($users, 'last_name', 'id');
print_r($lastNames);
Array
(
[123] => Max
[456] => Bob
[789] => Alice
)
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$users = [
];
$fullNames = array_map(function($user) {
return $user['first_name'] . ' ' . $user['last_name'];
}, $users);
print_r($fullNames);
Array
(
[0] => Max Gopey
[1] => Bob Doe
[2] => Alice Doe
)
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$users = [
];
$index = array_search('Alice Doe', array_map(function($user) {
return $user['first_name'] . ' ' . $user['last_name'];
}, $users));
print_r($index);
2
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$users = [
['first_name' => 'Max', 'last_name' => 'Gopey', 'company' => 'CGI'],
['first_name' => 'Bob', 'last_name' => 'Doe', 'company' => 'Google'],
['first_name' => 'Alice', 'last_name' => 'Doe', 'company' => 'Google'],
];

$byCompany = array_reduce($users, function($result, $user) {
@$result[$user['company']][] = $user['first_name'] . ' ' . $user['last_name'];
return $result;
}, []);
print_r($byCompany);
Array (
[CGI] => Array (
[0] => Max Gopey
)
[Google] => Array (
[0] => Bob Doe
[1] => Alice Doe
)
)
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$users = [
];

$CgiUsers = array_filter($users, function($user) {
return $user['company'] === 'CGI';
});
print_r($CgiUsers);
Array (
[0] => Array (
[first_name] => Max
[last_name] => Gopey
[company] => CGI
)
)
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$users = [
];
array_walk($users, function(&$user, $index) {
unset($user['last_name'], $user['company']);
$user['first_name'] .= ' ❤';
});
print_r($users);
Array (
[0] => Array (
[first_name] => Max ❤
)
[1] => Array (
[first_name] => Bob ❤
)
[2] => Array(
[first_name] => Alice ❤
)
)
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$users = [
];

print_r(getBobsAndAlicesWithD($users));
Array
(
[bobs] => Array (
[0] => Doe, Bob
)
[alices] => Array (
[0] => Doe, Alice
)
)
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17

Chapter 3
Generators
Traversable (Interface)
├── Iterator (Interface)
│ └── Generator (Class)
└── IteratorAggregate (Interface)
18

SymfonyComponentProcessInputStream
Click me
21

Chapter 3
Functional programming
23

Chapter 3
Non-standard PHP library (NSPL)
Click me
25

$startsWith = function ($string, $substing) {
return stripos($string, $substing) === 0;
};
$contains = function($string, $substing) {
return stripos($string, $substing) !== false;
};
$getFullName = function ($firstName, $lastName) {
return $lastName . ', ' . $firstName;
};

$startsWithD = frpartial($startsWith, 'd');
$isBob = frpartial($contains, 'bob');

$getFullNameFromUser = function ($user) use ($getFullName) {
return $getFullName($user['first_name'], $user['last_name']);
};
$getStackKey = function($name) use ($isBob) {
return $isBob($name) ? 'bobs' : 'alices';
};
$putToCorrectStack = function($stacks, $value) use ($getStackKey) {
$stacks[$getStackKey($value)][] = $value;
return $stacks;
};
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$getBobsAndAlicesWithD = function ($users)
use ($startsWithD, $getFullNameFromUser, $putToCorrectStack) {
return fpipe(
$users,
fpartial(amap, $getFullNameFromUser),
fpartial(afilter, $startsWithD),
fppartial(areduce, [
0 => $putToCorrectStack,
2 => ['bobs' => [], 'alices' => []]
])
);
};

print_r($getBobsAndAlicesWithD($users));
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Chapter 3
Obvious logical operations
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if (anyOf([1, 3, 5])->is(5)) {
// do something
}
if (anyOf([$name, $surname])->matches('/^w+$/') {
// do something
}
if (allOf([1, 3, 5])->areNot(6)) {
// do something
}
if (either($condition1)->or($condition2)) {
// do something
}
if (neither($x)->nor($y)) {
// do something
}
if (the($x)->isNeither(5)->nor(10)) {
// do something
}
if (the($x)->isGreaterThan(5)->butLessThan(10)) {
// do something
}
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Chapter 3
Obvious regexp
____ _____ ____ _ _ _ ____ _ _ ____
| _ ___ __ _| ____|_ ___ __ | __ ) _ _(_) | __| | ___ _ __| _ | | | | _
| |_) / _ / _` | _| / / '_ | _ | | | | | |/ _` |/ _ '__| |_) | |_| | |_) |
| _ < __/ (_| | |___ > <| |_) | |_) | |_| | | | (_| | __/ | | __/| _ | __/
|_| ____|__, |_____/_/_ .__/|____/ __,_|_|_|__,_|___|_| |_| |_| |_|_|
|___/ |_|
30

$regExp = $builder
->startOfInput()
->exactly(4)->digits()
->then("_")
->exactly(2)->digits()
->then("_")
->min(3)->max(10)->letters()
->then(".")
->anyOf(array("png", "jpg", "gif"))
->endOfInput()
->getRegExp();

//true
$regExp->matches("2020_10_hund.jpg");
$regExp->matches("2030_11_katze.png");
$regExp->matches("4000_99_maus.gif");

//false
$regExp->matches("123_00_nein.gif");
$regExp->matches("4000_0_nein.pdf");
$regExp->matches("201505_nein.jpg");
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Useful links
Generators and Coroutines
•   Хабр: Coroutines в PHP и работа с неблокирующими функциями
•   Github: Asynchronous coroutines for PHP 7.
•   A Curious Course on Coroutines and Concurrency
•   Symfony/Component/Process/InputStream.php
Functional programming
•   Github: Non-standard PHP library (NSPL) - compact functional programming oriented code
Human-readable regular expressions
•   Github: RegexpBuilderPHP
•   Github: PHPVerbalExpressions
Kittens
•   Youtube: The funniest kitten in the world
32

How else can you write the code in PHP?

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